utils.js — express Source File

Source Code

/*!
 * express
 * Copyright(c) 2009-2013 TJ Holowaychuk
 * Copyright(c) 2014-2015 Douglas Christopher Wilson
 * MIT Licensed
 */

'use strict';

/**
 * Module dependencies.
 * @api private
 */

var { METHODS } = require('node:http');
var contentType = require('content-type');
var etag = require('etag');
var mime = require('mime-types')
var proxyaddr = require('proxy-addr');
var qs = require('qs');
var querystring = require('node:querystring');
const { Buffer } = require('node:buffer');


/**
 * A list of lowercased HTTP methods that are supported by Node.js.
 * @api private
 */
exports.methods = METHODS.map((method) => method.toLowerCase());

/**
 * Return strong ETag for `body`.
 *
 * @param {String|Buffer} body
 * @param {String} [encoding]
 * @return {String}
 * @api private
 */

exports.etag = createETagGenerator({ weak: false })

/**
 * Return weak ETag for `body`.
 *
 * @param {String|Buffer} body
 * @param {String} [encoding]
 * @return {String}
 * @api private
 */

exports.wetag = createETagGenerator({ weak: true })

/**
 * Normalize the given `type`, for example "html" becomes "text/html".
 *
 * @param {String} type
 * @return {Object}
 * @api private
 */

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